Shopping Cart userdata

function get_userdata($user_id) {
        global $wpdb;

        if ( ! is_numeric( $user_id ) )
            return false;

        $user_id = absint( $user_id );
        if ( ! $user_id )
            return false;

        $userquery = "SELECT * FROM " . $wpdb -> usermeta . " WHERE user_id = '" . $user_id . "'";

        $userdata = array();
        $wpuserdata = get_userdata($user_id);

        if ($user = $wpdb -> get_results($userquery)) {
            foreach ($user as $u) {
                $userdata[$u -> meta_key] = $u -> meta_value;
            }

            foreach ($wpuserdata -> data as $wpukey => $wpuval) {
                $userdata[$wpukey] = $wpuval;
            }
        }

        return (object) $userdata;
    }

    function userdata($user_id = null) {
        global $user_ID, $wpcoDb, $Country;
        $oldmodel = $wpcoDb -> model;

        if ($user_ID || $user_id) {
            $id = (empty($user_id)) ? $user_ID : $user_id;

            if (!empty($id)) {
                $userdata = $this -> get_userdata($id);

                if (!empty($userdata)) {
                    foreach ($userdata as $ukey => $uval) {
                        switch ($ukey) {
                            case 'ship_country'                 :
                                global $wpcoDb, $Country;
                                $wpcoDb -> model = $Country -> model;
                                //$userdata -> ship_countrycode = $Country -> code_by_id($uval);
                                $userdata -> ship_countrycode = $wpcoDb -> field('code', array('id' => $uval));
                                $userdata -> ship_countryname = $wpcoDb -> field('value', array('id' => $uval));
                                break;
                            case 'bill_country'                 :
                                global $wpcoDb, $Country;
                                $wpcoDb -> model = $Country -> model;
                                //$userdata -> bill_countrycode = $Country -> code_by_id($uval);
                                $userdata -> bill_countrycode = $wpcoDb -> field('code', array('id' => $uval));
                                $userdata -> bill_countryname = $wpcoDb -> field('value', array('id' => $uval));
                                break;
                        }
                    }

                    return $userdata;
                }
            }
        }

        $wpcoDb -> model = $oldmodel;
        return false;
    }